Gaya APA

Bok, B, J., Bok, P, F. (1976). The Milky Way (Ed. 4). New York: President And Fellows Of Harvard College.

Gaya MLA

Bok, Bart, J.., Bok, Priscilla, F.. "The Milky Way". Ed. 4 New York: President And Fellows Of Harvard College, 1976. Text.