Gaya APA
Youngken, H, W.
(1950).
Textbook Of Pharmacognosy
(
6)
.
USA:
McGraw-Hill book company.Inc.
Gaya MLA
Youngken, Heber, W..
"Textbook Of Pharmacognosy".
6
USA:
McGraw-Hill book company.Inc,
1950.
Text.