APA (7th ed.) Citation

Alexander, L. G. (1973). Mainline: Progress B, students' book (1a. ed.). Longman.

Chicago Style (17th ed.) Citation

Alexander, Louis George. Mainline: Progress B, Students' Book. 1a. ed. Londres: Longman, 1973.

MLA (9th ed.) Citation

Alexander, Louis George. Mainline: Progress B, Students' Book. 1a. ed. Longman, 1973.