APA (7th ed.) Citation

Cassels, J. W. W. (1960). How to sell successfully by direct mail ([Rev. 4th ed.].). Business Publications.

Chicago Style (17th ed.) Citation

Cassels, John William Wilberforce. How to Sell Successfully by Direct Mail. [Rev. 4th ed.]. London: Business Publications, 1960.

MLA (9th ed.) Citation

Cassels, John William Wilberforce. How to Sell Successfully by Direct Mail. [Rev. 4th ed.]. Business Publications, 1960.