APA (7th ed.) Citation

National Textbook Company. (1977). Viva el español!: Learning system B (2nd ed.). National Textbook Co..

Chicago Style (17th ed.) Citation

National Textbook Company. Viva El Español!: Learning System B. 2nd ed. Lincolnwood, Ill.: National Textbook Co., 1977.

MLA (9th ed.) Citation

National Textbook Company. Viva El Español!: Learning System B. 2nd ed. National Textbook Co., 1977.