Pennsylvania State Beekeepers' Association. (1928). Official organ of the Pennsylvania State Bee-Keepers' Association. The Association.
Lua i Stíl Chicago (17ú heag.)Pennsylvania State Beekeepers' Association. Official Organ of the Pennsylvania State Bee-Keepers' Association. [S.l.]: The Association, 1928.
Lua MLA (8ú heag.)Pennsylvania State Beekeepers' Association. Official Organ of the Pennsylvania State Bee-Keepers' Association. The Association, 1928.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.