APA (7e ed.) Bronvermelding

Toronto Mail Order Staff. (1990). "Questions Kids Ask About This and That (Questions Kids Ask, 27)". Grolier Limited.

Chicago (17e ed.) Bronvermelding

Toronto Mail Order Staff. "Questions Kids Ask About This and That (Questions Kids Ask, 27)". Grolier Limited, 1990.

MLA (9e ed.) Bronvermelding

Toronto Mail Order Staff. "Questions Kids Ask About This and That (Questions Kids Ask, 27)". Grolier Limited, 1990.

Let op: Deze citaties zijn niet altijd 100% accuraat.