Cita APA (7th ed.)

SHEPHERD, J. F. (1987). College vocabulary skills.-- Ed.3. Houghton Mifflin.

Cita Chicago (17th ed.)

SHEPHERD, James F. College Vocabulary Skills.-- Ed.3. Boston: Houghton Mifflin, 1987.

Cita MLA (9th ed.)

SHEPHERD, James F. College Vocabulary Skills.-- Ed.3. Houghton Mifflin, 1987.