Sethi, P. (1999). Nature and scope of tourism. Rajat.
Chicagoスタイル(17版)引用形式Sethi, Praveen. Nature and Scope of Tourism. Delhi: Rajat, 1999.
MLA(9版)引用形式Sethi, Praveen. Nature and Scope of Tourism. Rajat, 1999.
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APA(7版)引用形式