Dyfyniad APA

Goodman, G. S. (1984). You can sell anything by telephone! Prentice-Hall.

Dyfyniad Arddull Chicago

Goodman, Gary S. You Can Sell Anything by Telephone! New York: Prentice-Hall, 1984.

Dyfyniad MLA

Goodman, Gary S. You Can Sell Anything by Telephone! Prentice-Hall, 1984.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.