Παραπομπή APA

Gundrey, E. (1964). At your service: A consumer's guide to the service trades and professions. Penguin books inc.

Παραπομπή Chicago Style

Gundrey, Elizabeth. At Your Service: A Consumer's Guide to the Service Trades and Professions. USA: Penguin books inc, 1964.

Παραπομπή MLA

Gundrey, Elizabeth. At Your Service: A Consumer's Guide to the Service Trades and Professions. Penguin books inc, 1964.