Hallingby, L. (1985). A Human Sexuality and Sex Education Information Service and Library.
Citazione stile Chigago Style (17a edizione)Hallingby, Leigh. A Human Sexuality and Sex Education Information Service and Library. 1985.
Citatione MLA (9a ed.)Hallingby, Leigh. A Human Sexuality and Sex Education Information Service and Library. 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.