Hein, M. (1977). Foundations of college chemistry (4th ed.). Brooks/Cole.
Citazione stile Chigago Style (17a edizione)Hein, Morris. Foundations of College Chemistry. 4th ed. Monterey: Brooks/Cole, 1977.
Citatione MLA (9a ed.)Hein, Morris. Foundations of College Chemistry. 4th ed. Brooks/Cole, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.