APA ציטוט

Spellman, F. R. (1999). Environmental science and technology: Concepts and applications. Rockville, Md: Government Institutes.

Trích dẫn kiểu Chicago

Spellman, Frank R. Environmental Science and Technology: Concepts and Applications. Rockville, Md: Government Institutes, 1999.

ציטוט MLA

Spellman, Frank R. Environmental Science and Technology: Concepts and Applications. Rockville, Md: Government Institutes, 1999.