Cita APA (7th ed.)

Hybels, S., & Weaver, R. L. (1998). Communicating effectively (5th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Hybels, Saundra, i Richard L. Weaver. Communicating Effectively. 5th ed. Boston, MA: McGraw-Hill, 1998.

Cita MLA (9th ed.)

Hybels, Saundra, i Richard L. Weaver. Communicating Effectively. 5th ed. McGraw-Hill, 1998.