Cita APA (7th ed.)

Spaulding, N. E., & Namowitz, S. N. (1994). Earth science. Heath.

Cita Chicago (17th ed.)

Spaulding, Nancy E., i Samuel N. Namowitz. Earth Science. Lexington, Massachusetts: Heath, 1994.

Cita MLA (9th ed.)

Spaulding, Nancy E., i Samuel N. Namowitz. Earth Science. Heath, 1994.