Freud,Sigmund, & Richards,Angela. (1970). On sexuality: Three essays on the theory of sexuality and other works. Penguin.
Lua i Stíl Chicago (17ú heag.)Freud,Sigmund, agus Richards,Angela. On Sexuality: Three Essays on the Theory of Sexuality and Other Works. Harmondsworth,: Penguin, 1970.
Lua MLA (8ú heag.)Freud,Sigmund, agus Richards,Angela. On Sexuality: Three Essays on the Theory of Sexuality and Other Works. Penguin, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.