Cita APA (7th ed.)

Grolier Limited. (1989). "Questions Kids Ask About Birds (Questions Kids Ask, 7)". Grolier Limited.

Cita Chicago (17th ed.)

Grolier Limited. "Questions Kids Ask About Birds (Questions Kids Ask, 7)". Grolier Limited, 1989.

Cita MLA (9th ed.)

Grolier Limited. "Questions Kids Ask About Birds (Questions Kids Ask, 7)". Grolier Limited, 1989.

Atenció: Aquestes cites poden no estar 100% correctes.