Gaya APA

Hearst, J, E., B., I, I, J. (1976). Contemporary chemistry . San Francisco: San Francisco: W.H. Freeman and Co.; 1976.

Gaya MLA

Hearst, John, E.., B., I., Ifft,, James. "Contemporary chemistry". San Francisco: San Francisco: W.H. Freeman and Co.; 1976, 1976. Text.