Alusik, J. (1973). Illustrated handbook of general science teaching aids. Parker Pub. Co.
Chicago (17e ed.) BronvermeldingAlusik, John. Illustrated Handbook of General Science Teaching Aids. West Nyack, N.Y: Parker Pub. Co, 1973.
MLA (9e ed.) BronvermeldingAlusik, John. Illustrated Handbook of General Science Teaching Aids. Parker Pub. Co, 1973.
Let op: Deze citaties zijn niet altijd 100% accuraat.