There are a number of books and resources on the Internet that show you the form for writing a formal letter. Usually, it includes the date, the recipient's address, your address and contact details, a salutation and a closing. Styles vary but as long is the letter is neat and professional, it will make a good impression.
If you are appealing for volunteers to help in a community center, it is important to state how there help will benefit the community. You might also want to include some words about how the volunteers will benefit. Some possible rewards are work experience, the chance to meet new people, the benefits of the facility to the whole community, and the good feeling that comes from giving. You could give people flexible options for working in order that they will be more inclined. For instance, you could offer short two-hour shifts if necessary. Lastly, remember to write the letter from your heart and people will likely respond.
If you are appealing for volunteers to help in a community center, it is important to state how there help will benefit the community. You might also want to include some words about how the volunteers will benefit. Some possible rewards are work experience, the chance to meet new people, the benefits of the facility to the whole community, and the good feeling that comes from giving. You could give people flexible options for working in order that they will be more inclined. For instance, you could offer short two-hour shifts if necessary. Lastly, remember to write the letter from your heart and people will likely respond.