Gaya APA

Swanson, C, P., Gregg, D, C. (1968). Principles of chemistry . Boston: Boston: Allyn and Bacon; 1968.

Gaya MLA

Swanson, Carl, P.., Gregg, Donald, C.. "Principles of chemistry". Boston: Boston: Allyn and Bacon; 1968, 1968. Text.