Citazione Stile APA (7a Edizione)

Greenough, R. (1961). Africa calls.... development of education the needs and problems. UNESCO.

Citazione stile Chigago Style (17a edizione)

Greenough, Richard. Africa Calls.... Development of Education the Needs and Problems. Paris: UNESCO, 1961.

Citatione MLA (9a ed.)

Greenough, Richard. Africa Calls.... Development of Education the Needs and Problems. UNESCO, 1961.