APA

Williams H., Turner F. J., Gilbert C. M., Gilbert C. M. & Turner F. J. (1982). Petrography. New York [u.a.]: Freeman.

Chicago

Williams Howel, Turner Francis J, Gilbert Charles M, Gilbert Charles Merwin and Turner Francis John. 1982. Petrography. New York [u.a.]: Freeman.

Harvard

Williams H., Turner F. J., Gilbert C. M., Gilbert C. M. and Turner F. J. (1982). Petrography. New York [u.a.]: Freeman.

MLA

Williams Howel, Turner Francis J, Gilbert Charles M, Gilbert Charles Merwin and Turner Francis John. Petrography. New York [u.a.]: Freeman. 1982.