APA

Mayall R. N., Mayall M. W., Wyckoff J. & Polgreen J. (1977). The sky observer's guide. New York: Golden Press.

Chicago

Mayall R Newton, Mayall Margaret W, Wyckoff Jerome and Polgreen John. 1977. The sky observer's guide. New York: Golden Press.

Harvard

Mayall R. N., Mayall M. W., Wyckoff J. and Polgreen J. (1977). The sky observer's guide. New York: Golden Press.

MLA

Mayall R Newton, Mayall Margaret W, Wyckoff Jerome and Polgreen John. The sky observer's guide. New York: Golden Press. 1977.