APA

Ryckman W. G., . (1980). What do you mean by that?: The art of speaking and writing clearly. Homewood, Ill: Dow Jones-Irwin.

Chicago

Ryckman W G, . 1980. What do you mean by that?: The art of speaking and writing clearly. Homewood, Ill: Dow Jones-Irwin.

Harvard

Ryckman W. G., . (1980). What do you mean by that?: The art of speaking and writing clearly. Homewood, Ill: Dow Jones-Irwin.

MLA

Ryckman W G, . What do you mean by that?: The art of speaking and writing clearly. Homewood, Ill: Dow Jones-Irwin. 1980.