Gaya APA

Pickard, G, L., Emery, W, J. (1990). Descriptive physical oceanography : an introduction (5 th en1. ed. (in SI units)). Oxford: Pergamon.

Gaya MLA

Pickard, George, L.., Emery, William, J.. "Descriptive physical oceanography : an introduction". 5 th en1. ed. (in SI units) Oxford: Pergamon, 1990. Text.