Principles of chemistry

MLA

Hildebrand, Joel Henry and Edgar Fahs Smith Memorial Collection (University of Pennsylvania). Principles of chemistry. Fourth edition. New York : The Macmillan company, 1940 1943.

APA

Hildebrand, J. & Edgar Fahs Smith Memorial Collection (University of Pennsylvania). (1940). Principles of chemistry. Fourth edition. New York : The Macmillan company.

Chicago

Hildebrand, Joel Henry and Edgar Fahs Smith Memorial Collection (University of Pennsylvania). Principles of chemistry. Fourth edition. New York : The Macmillan company, 1940 1943.