Pennsylvania State Beekeepers' Association. (1929). Pennsylvania beekeeper. Pennsylvania State Beekeepers Association.
Lua i Stíl Chicago (17ú heag.)Pennsylvania State Beekeepers' Association. Pennsylvania Beekeeper. [S.l.]: Pennsylvania State Beekeepers Association, 1929.
Lua MLA (8ú heag.)Pennsylvania State Beekeepers' Association. Pennsylvania Beekeeper. Pennsylvania State Beekeepers Association, 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.