Gaya APA

Hartshorn, W, C., Leavitt, H, S. (1940). The World of Music=Making Friends with Music [1]: Prelude (Cet. 1.--). Boston: Ginn.

Gaya MLA

Hartshorn, William, C.., Leavitt, Helen, S.. "The World of Music=Making Friends with Music [1]: Prelude". Cet. 1.-- Boston: Ginn, 1940. Text.