APA (7e ed.) Bronvermelding

various. (1991). QUESTIONS KIDS ASK ABOUT SNAKES AND FROGS VOL 17 (Unknown.). Grollier Limited.

Chicago (17e ed.) Bronvermelding

various. QUESTIONS KIDS ASK ABOUT SNAKES AND FROGS VOL 17. Unknown. Grollier Limited, 1991.

MLA (9e ed.) Bronvermelding

various. QUESTIONS KIDS ASK ABOUT SNAKES AND FROGS VOL 17. Unknown. Grollier Limited, 1991.

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