Nelson, G., Winters, T., Clark, R. Do As I Say. Brattleboro: Pro Lingua Associates, 2004 82 p., ill. 0-86647-159-6.
Nelson, G., Winters, T., Clark, R. Do As I Say. Brattleboro: Pro Lingua Associates, 2004 82 p., ill. 0-86647-159-6.
Nelson, G., Winters, T., Clark, R. (2004) Do As I Say, Brattleboro: Pro Lingua Associates 82 p., ill. 0-86647-159-6.
Nelson, G., Winters, T., & Clark, R. (2004). Do As I Say. Operations, Procedures, and Rituals for Language Acquisition. Brattleboro: Pro Lingua Associates, 82 p., ill.
Nelson G, Winters T, Clark R. Do As I Say: Operations, Procedures, and Rituals for Language Acquisition. Brattleboro: Pro Lingua Associates; 2004. p. 82 p., ill. ISBN: 0-86647-159-6.