Dyfyniad APA

Dolby, S. K. (2005). Self-help books: Why Americans keep reading them. University of Illinois Press.

Dyfyniad Arddull Chicago

Dolby, Sandra K. Self-help Books: Why Americans Keep Reading Them. Urbana: University of Illinois Press, 2005.

Dyfyniad MLA

Dolby, Sandra K. Self-help Books: Why Americans Keep Reading Them. University of Illinois Press, 2005.

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