Gaya APA
Ulbricht, C, E. (2010).
Natural Standard Herb & Supplement Guide : An Evidence-Based Reference .
Missouri:
Mosby Elsevier.
Gaya MLA
Ulbricht, Catherine, E..
"Natural Standard Herb & Supplement Guide : An Evidence-Based Reference".
Missouri:
Mosby Elsevier,
2010.
Text.