Cruz, Z. L. (1982). Tourism: An introduction. Rex Book Store.
Cita Chicago (17th ed.)Cruz, Zenaida L. Tourism: An Introduction. Manila: Rex Book Store, 1982.
Cita MLA (9th ed.)Cruz, Zenaida L. Tourism: An Introduction. Rex Book Store, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.