APA
Hampel C. A. e., Hawley Gessner G, . (1973). The Encylopedia of chemistry. New York: Van Nostrand Reinhold.
Chicago
Hampel Clifford A ed, Hawley Gessner G, . 1973. The Encylopedia of chemistry. New York: Van Nostrand Reinhold.
Harvard
Hampel C. A. e., Hawley Gessner G, . (1973). The Encylopedia of chemistry. New York: Van Nostrand Reinhold.
MLA
Hampel Clifford A ed, Hawley Gessner G, . The Encylopedia of chemistry. New York: Van Nostrand Reinhold. 1973.