Gaya APA

STWERTKA, A., SCHOENBERG, I, E. (2002). A guide to the lelements / Albert Stwertka . New York: Oxford University Press.

Gaya MLA

STWERTKA, Albert., SCHOENBERG, Irene, E.. "A guide to the lelements / Albert Stwertka". New York: Oxford University Press, 2002. Text.