Gaya APA

Alexander, L. G.. (1970). Practice and Program Supplementary Written Exercises: New Concept English (Cet. 1.--). Inggris: Longmans.

Gaya Chicago

Alexander, L. G.. Practice and Program Supplementary Written Exercises: New Concept English. Cet. 1.-- Inggris: Longmans, 1970. Text.

Gaya MLA

Alexander, L. G.. Practice and Program Supplementary Written Exercises: New Concept English. Cet. 1.-- Inggris: Longmans, 1970. Text.

Gaya Turabian

Alexander, L. G.. Practice and Program Supplementary Written Exercises: New Concept English. Cet. 1.-- Inggris: Longmans, 1970. Print.