various. (1991). QUESTIONS KIDS ASK ABOUT SNAKES AND FROGS VOL 17 (Unknown.). Grollier Limited.
Cita Chicago (17th ed.)various. QUESTIONS KIDS ASK ABOUT SNAKES AND FROGS VOL 17. Unknown. Grollier Limited, 1991.
Cita MLA (9th ed.)various. QUESTIONS KIDS ASK ABOUT SNAKES AND FROGS VOL 17. Unknown. Grollier Limited, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.