Gaya APA
Windholz, M.
(1982).
The Merck Index Ninth Edition
(
Ninth)
.
U.S.A:
Merck & Co Inc.
Gaya MLA
Windholz, Martha.
"The Merck Index Ninth Edition".
Ninth
U.S.A:
Merck & Co Inc,
1982.
Text.