Gaya APA

Sayers, D, L. et al (1975). Oxford Graded Readers [Junior Lever]: The Dragon's Head (Cet. 1.--). London: Oxford University Press.

Gaya MLA

Sayers, Dorothy, L.. et al. "Oxford Graded Readers [Junior Lever]: The Dragon's Head". Cet. 1.-- London: Oxford University Press, 1975. Text.