Cita APA (7th ed.)

RYCKMAN, W. (1983). The art of writing clearly. Dow Jones-Irwin.

Cita Chicago (17th ed.)

RYCKMAN, W.G. The Art of Writing Clearly. Illinois: Dow Jones-Irwin, 1983.

Cita MLA (9th ed.)

RYCKMAN, W.G. The Art of Writing Clearly. Dow Jones-Irwin, 1983.