Opal /
Opal Whiteley ; arranged and adapted by Jane Boulton.

APA Citation

Boulton, J., Whiteley, O. Stanley. (1976). Opal. New York: Macmillan.

MLA Citation

Boulton, Jane, and Opal Stanley Whiteley. Opal. New York: Macmillan, 1976.

Warning: These citations may not always be complete (especially for serials).