Gaya APA
Ulbricht, C, E. (2010).
NATURAL STANDARD herb & supplement guide an evidence-based reference .
USA:
Mosby Elsevier.Inc.
Gaya MLA
Ulbricht, Catherine, E..
"NATURAL STANDARD herb & supplement guide an evidence-based reference".
USA:
Mosby Elsevier.Inc,
2010.
Text.