APA
Eastman, Eastman, . (2020). The Big Blue Book of Beginner Books. US: Beginner Books.
Chicago
Eastman, Eastman, . 2020. The Big Blue Book of Beginner Books. US: Beginner Books.
Harvard
Eastman, Eastman, . (2020). The Big Blue Book of Beginner Books. US: Beginner Books.
MLA
Eastman, Eastman, . The Big Blue Book of Beginner Books. US: Beginner Books. 2020.