Lua APA (7ú heag.)

Nitschke, A. A., & Frye, W. (2008). Managing housekeeping operations (3.). American hotel & lodging educational institue.

Lua i Stíl Chicago (17ú heag.)

Nitschke, Aleta A., agus Willam Frye. Managing Housekeeping Operations. 3. Michigan: American hotel & lodging educational institue, 2008.

Lua MLA (9ú heag.)

Nitschke, Aleta A., agus Willam Frye. Managing Housekeeping Operations. 3. American hotel & lodging educational institue, 2008.

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