Citazione Stile APA (7a Edizione)

Stevens, R. (1969). Out-of school science activities for young people. United Nations Educational Scientific and Cultural Organization.

Citazione stile Chigago Style (17a edizione)

Stevens, Roger. Out-of School Science Activities for Young People. United Nations Educational,Scientific and Cultural Organization: United Nations Educational Scientific and Cultural Organization, 1969.

Citatione MLA (9a ed.)

Stevens, Roger. Out-of School Science Activities for Young People. United Nations Educational Scientific and Cultural Organization, 1969.