Gaya APA

Brieger, N., Cornish, A. (1989). SECRETARIAL CONTACS COMMUNICATIONS SKILLS FOR SECRETARIES AND PERSONAL ASSISTANTS . Singapore: Prentice Hall.

Gaya MLA

Brieger, Nick., Cornish, Anthony. "SECRETARIAL CONTACS COMMUNICATIONS SKILLS FOR SECRETARIES AND PERSONAL ASSISTANTS". Singapore: Prentice Hall, 1989. .