Cassles, J. W. W. (1960). How to sell successfully by direct mail (IV.).
Chicago Style aipamenaCassles, J W W. How to Sell Successfully by Direct Mail. IV. :, 1960.
MLA aipamenaCassles, J W W. How to Sell Successfully by Direct Mail. IV. 1960.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.