Hjorth, N. (1961). Eczematous allergy to balsams: Allied perfumes and flavouring agents, with special reference to balsam of Peru. Munksgaard.
Lua i Stíl Chicago (17ú heag.)Hjorth, Niels. Eczematous Allergy to Balsams: Allied Perfumes and Flavouring Agents, with Special Reference to Balsam of Peru. Copenhagen: Munksgaard, 1961.
Lua MLA (8ú heag.)Hjorth, Niels. Eczematous Allergy to Balsams: Allied Perfumes and Flavouring Agents, with Special Reference to Balsam of Peru. Munksgaard, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.