Gaya APA
Sirait, M., Martindale, . (1994).
The Extra Pharmacopoeia Buku 2 (13th Ed.).
Singapore:
Info Access and Distribution.
Gaya MLA
Sirait, Median., Martindale, .
"The Extra Pharmacopoeia Buku 2".
13th Ed.
Singapore:
Info Access and Distribution,
1994.
Text.