Spellman, F. R. (1999). Environmental science and technology: Concepts and applications. Rockville, Md: Government Institutes.
Trích dẫn kiểu ChicagoSpellman, Frank R. Environmental Science and Technology: Concepts and Applications. Rockville, Md: Government Institutes, 1999.
ציטוט MLASpellman, Frank R. Environmental Science and Technology: Concepts and Applications. Rockville, Md: Government Institutes, 1999.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.