Παραπομπή APA

Garber, P. (2007). 25 sales strategies and activities. H.R.D.

Παραπομπή Chicago Style

Garber, Peter.R. 25 Sales Strategies and Activities. Amherst: H.R.D, 2007.

Παραπομπή MLA

Garber, Peter.R. 25 Sales Strategies and Activities. H.R.D, 2007.