APA

Hybels S., Weaver R. L. 1. . I., . (2009). Communicating effectively. New York, N.Y: McGraw Hill.

Chicago

Hybels Saundra, Weaver Richard L 1941 II, . 2009. Communicating effectively. New York, N.Y: McGraw Hill.

Harvard

Hybels S., Weaver R. L. 1. . I., . (2009). Communicating effectively. New York, N.Y: McGraw Hill.

MLA

Hybels Saundra, Weaver Richard L 1941 II, . Communicating effectively. New York, N.Y: McGraw Hill. 2009.