Gaya APA

English Language Services, Inc.. (1967). English 900 : A Basic Course (Book Six) (Fourth Printing, 1967). New York: The Macmillan Company.

Gaya Chicago

English Language Services, Inc.. English 900 : A Basic Course (Book Six). Fourth Printing, 1967 New York: The Macmillan Company, 1967. Text.

Gaya MLA

English Language Services, Inc.. English 900 : A Basic Course (Book Six). Fourth Printing, 1967 New York: The Macmillan Company, 1967. Text.

Gaya Turabian

English Language Services, Inc.. English 900 : A Basic Course (Book Six). Fourth Printing, 1967 New York: The Macmillan Company, 1967. Print.