Gaya APA

Aulbach, R, E. (1988). HOSPITALITY MANAGEMENT LIBRARY : ENERGY (second edition) (2). Michigan: Educational Institute of the American Hotel & Motel Association.

Gaya MLA

Aulbach, Robert, E.. "HOSPITALITY MANAGEMENT LIBRARY : ENERGY (second edition)". 2 Michigan: Educational Institute of the American Hotel & Motel Association, 1988. Text.