Dyfyniad APA

SHELTOR, N., & BURTON, S. (1994). Assertiveness skills. Businnes One Irwin.

Dyfyniad Arddull Chicago

SHELTOR, Nelda, and Sharon BURTON. Assertiveness Skills. Burr Ridge: Businnes One Irwin, 1994.

Dyfyniad MLA

SHELTOR, Nelda, and Sharon BURTON. Assertiveness Skills. Businnes One Irwin, 1994.

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