Dyfyniad APA

Institute of marketing and sales management. (1961). Manuel of sales management. Sir Issac Pitman and Sons.

Dyfyniad Arddull Chicago

Institute of marketing and sales management. Manuel of Sales Management. London: Sir Issac Pitman and Sons, 1961.

Dyfyniad MLA

Institute of marketing and sales management. Manuel of Sales Management. Sir Issac Pitman and Sons, 1961.

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