What's a schwa sound anyway? :
a holistic guide to phonetics, phonics, and spelling /
Sandra Wilde.
APA Citation
Wilde, S. (1997). What's a schwa sound anyway?: a holistic guide to phonetics, phonics, and spelling. Portsmouth, NH: Heinemann.
MLA Citation
Wilde, Sandra. What's a Schwa Sound Anyway?: a Holistic Guide to Phonetics, Phonics, And Spelling. Portsmouth, NH: Heinemann, 1997.
Warning: These citations may not always be complete (especially for serials).