Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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