APA-referens (7:e uppl.)

FOSTER STEVEN[A]. (2002). FIELD GUIDE TO WESTERN MEDICINAL PLANTS AND HERBS (2ND ED.). HOUGHTON MIFFIN COMPANY.

Chicago-referens (17:e uppl.)

FOSTER STEVEN[A]. FIELD GUIDE TO WESTERN MEDICINAL PLANTS AND HERBS. 2ND ED. BOSTAN: HOUGHTON MIFFIN COMPANY, 2002.

MLA-referens (9:e uppl.)

FOSTER STEVEN[A]. FIELD GUIDE TO WESTERN MEDICINAL PLANTS AND HERBS. 2ND ED. HOUGHTON MIFFIN COMPANY, 2002.