Butterworth, R. R., & Flodin, M. (1989). Signing made easy: A complete program for learning sign language, includes sentence drills and exercises for increased comprehension and signing skill. Putnam.
Цитирование в стиле Чикаго (17-е изд.)Butterworth, Rod R., и Mickey Flodin. Signing Made Easy: A Complete Program for Learning Sign Language, Includes Sentence Drills and Exercises for Increased Comprehension and Signing Skill. New York: Putnam, 1989.
Цитирование MLA (9-е изд.)Butterworth, Rod R., и Mickey Flodin. Signing Made Easy: A Complete Program for Learning Sign Language, Includes Sentence Drills and Exercises for Increased Comprehension and Signing Skill. Putnam, 1989.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.