Gaya APA

Ritchie, J, B., Goeldner, C, R. (1987). TRAVEL, TOURISM, AND HOSPITALITY RESEARCH A HANDBOOK FOR MANAGERS AND RESEARCHERS . Canada: SIMULTANEOUSLY.

Gaya MLA

Ritchie, J.R., Brent., Goeldner, Charles, R.. "TRAVEL, TOURISM, AND HOSPITALITY RESEARCH A HANDBOOK FOR MANAGERS AND RESEARCHERS". Canada: SIMULTANEOUSLY, 1987. Text.