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.
Atenció: Aquestes cites poden no estar 100% correctes.