Cita APA (7a ed.)

Cruz, Z. L. (2013). Principles of tourism. Rex Book Store.

Cita Chicago Style (17a ed.)

Cruz, Zenaida Lansangan. Principles of Tourism. Manila: Rex Book Store, 2013.

Cita MLA (9a ed.)

Cruz, Zenaida Lansangan. Principles of Tourism. Rex Book Store, 2013.