Cita APA (7a ed.)

Spielberger, C. D. (1972). Anxiety: Current trends in theory and research. Academic Press.

Cita Chicago Style (17a ed.)

Spielberger, Charles Donald. Anxiety: Current Trends in Theory and Research. New York [etc.]: Academic Press, 1972.

Cita MLA (9a ed.)

Spielberger, Charles Donald. Anxiety: Current Trends in Theory and Research. Academic Press, 1972.