Gerberich, J. R. (1956). Specimen objectrive test items: A guide to achievement test construction. Longmans.
Citazione stile Chigago Style (17a edizione)Gerberich, Joseph Raymond. Specimen Objectrive Test Items: A Guide to Achievement Test Construction. New York: Longmans, 1956.
Citatione MLA (9a ed.)Gerberich, Joseph Raymond. Specimen Objectrive Test Items: A Guide to Achievement Test Construction. Longmans, 1956.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.