Cita APA (7th ed.)

Spellman, F. R., & Price-Bayer, J. (2012). The handbook of nature. Government Institutes.

Cita Chicago (17th ed.)

Spellman, Frank R., i Joni Price-Bayer. The Handbook of Nature. Lanham, Md.: Government Institutes, 2012.

Cita MLA (9th ed.)

Spellman, Frank R., i Joni Price-Bayer. The Handbook of Nature. Government Institutes, 2012.