Cita APA

Skinner, B. J. (1976). Earth resources (2nd ed.). Prentice-hall.

Citación estilo Chicago

Skinner, Brian J. Earth Resources. 2nd ed. Englewood Cliffs, N. J: Prentice-hall, 1976.

Cita MLA

Skinner, Brian J. Earth Resources. 2nd ed. Prentice-hall, 1976.