Cita APA

Ryckman, W. G., & Ryckman, W. G. (1983). Personal learning aid for the art of writing clearly. Homewood, Ill: Dow Jones Irwin.

Citación estilo Chicago

Ryckman, W. G., y W. G. Ryckman. Personal Learning Aid for the Art of Writing Clearly. Homewood, Ill: Dow Jones Irwin, 1983.

Cita MLA

Ryckman, W. G., y W. G. Ryckman. Personal Learning Aid for the Art of Writing Clearly. Homewood, Ill: Dow Jones Irwin, 1983.