APA
Ecroyd D. H., Halfond M. M. j. . a. & Towne C. C. j. a. (1966). Voice and articulation. Glenview, Ill: Foresman.
Chicago
Ecroyd Donald H, Halfond Murray M jt author and Towne Carol C jt author. 1966. Voice and articulation. Glenview, Ill: Foresman.
Harvard
Ecroyd D. H., Halfond M. M. j. . a. and Towne C. C. j. a. (1966). Voice and articulation. Glenview, Ill: Foresman.
MLA
Ecroyd Donald H, Halfond Murray M jt author and Towne Carol C jt author. Voice and articulation. Glenview, Ill: Foresman. 1966.