Cita APA (7th ed.)

ADAMS GERALD R. (1985). UNDERSTANDING RESEARCH METHODS. LONGMAN GROUP.

Cita Chicago (17th ed.)

ADAMS GERALD R. UNDERSTANDING RESEARCH METHODS. NEW YORK LONDON: LONGMAN GROUP, 1985.

Cita MLA (9th ed.)

ADAMS GERALD R. UNDERSTANDING RESEARCH METHODS. LONGMAN GROUP, 1985.