Cruz, Z. L. (2008). Principles and ethics of tour guiding (Updated edition.). Rex Book Store.
Chicagoスタイル(17版)引用形式Cruz, Zenaida Lansangan. Principles and Ethics of Tour Guiding. Updated edition. Manila: Rex Book Store, 2008.
MLA(9版)引用形式Cruz, Zenaida Lansangan. Principles and Ethics of Tour Guiding. Updated edition. Rex Book Store, 2008.
警告: この引用は必ずしも正確ではありません.