Gaya APA

Hughes, John dkk. (). Life Elementary . : National Geographic Learning.

Gaya Chicago

Hughes, John dkk. Life Elementary. : National Geographic Learning, . Printed Book.

Gaya MLA

Hughes, John dkk. Life Elementary. : National Geographic Learning, . Printed Book.

Gaya Turabian

Hughes, John dkk. Life Elementary. : National Geographic Learning, . Printed Book.