Cita APA (7th ed.)

Klee, G. (1991). Conservation of natural resources. Prentice-Hall.

Cita Chicago (17th ed.)

Klee, Gary. Conservation of Natural Resources. Englewood Cliffs, N.J: Prentice-Hall, 1991.

Cita MLA (9th ed.)

Klee, Gary. Conservation of Natural Resources. Prentice-Hall, 1991.