Gaver, M. V. (1969). Patterns of development in elementary school libraries today: A five year report on emerging media centers (3rd ed.). Encyclopedia Britannica.
Παραπομπή σε μορφή Chicago (17η εκδ.)Gaver, Mary Virginia. Patterns of Development in Elementary School Libraries Today: A Five Year Report on Emerging Media Centers. 3rd ed. [Chicago]: Encyclopedia Britannica, 1969.
Παραπομπή σε μορφή MLA (9th εκδ.)Gaver, Mary Virginia. Patterns of Development in Elementary School Libraries Today: A Five Year Report on Emerging Media Centers. 3rd ed. Encyclopedia Britannica, 1969.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.