Cita APA (7a ed.)

Freud, S., Strachey, J., & Richards, A. (1977). Introductory lectures on psychoanalysis. Penguin Books.

Cita Chicago Style (17a ed.)

Freud, Sigmund, James Strachey, y Angela Richards. Introductory Lectures on Psychoanalysis. Harmondsworth, Middlesex, England: Penguin Books, 1977.

Cita MLA (9a ed.)

Freud, Sigmund, et al. Introductory Lectures on Psychoanalysis. Penguin Books, 1977.