Lua APA (7ú heag.)

Abadilla, D. C. (1976). Comfrey: Nature's health food. s.n.].

Lua i Stíl Chicago (17ú heag.)

Abadilla, Domingo C. Comfrey: Nature's Health Food. [S.l: s.n.], 1976.

Lua MLA (9ú heag.)

Abadilla, Domingo C. Comfrey: Nature's Health Food. s.n.], 1976.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.