Gaya APA
Walvoord, B, E. (1988).
Three steps to revising your writing for style, grammar, punctuation and spelling .
Glenview,IL:
Scott Foresman.
Gaya MLA
Walvoord, Barbara, E..
"Three steps to revising your writing for style, grammar, punctuation and spelling".
Glenview,IL:
Scott Foresman,
1988.
Text.