APA (7e ed.) Bronvermelding

Freud,Sigmund, & Richards,Angela. (1970). On sexuality: Three essays on the theory of sexuality and other works. Penguin.

Chicago (17e ed.) Bronvermelding

Freud,Sigmund, en Richards,Angela. On Sexuality: Three Essays on the Theory of Sexuality and Other Works. Harmondsworth,: Penguin, 1970.

MLA (8e ed.) Bronvermelding

Freud,Sigmund, en Richards,Angela. On Sexuality: Three Essays on the Theory of Sexuality and Other Works. Penguin, 1970.