Dokumentuaren aipamena

APA aipamena

Timm, P. R. (1995). 50 thuật giữ khách hàng. Hà Nội: văn Hoá thông Tin.

Chicago Style aipamena

Timm, Paul R. 50 Thuật Giữ Khách Hàng. Hà Nội: văn Hoá thông Tin, 1995.

MLA aipamena

Timm, Paul R. 50 Thuật Giữ Khách Hàng. Hà Nội: văn Hoá thông Tin, 1995.

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