Não informado. (1956). Journal of the Rio Grande Valley Horticultural Society. Rio Grande Valley Horticultural Society.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of the Rio Grande Valley Horticultural Society. Weslaco, Tex: Rio Grande Valley Horticultural Society, 1956.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of the Rio Grande Valley Horticultural Society. Rio Grande Valley Horticultural Society, 1956.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.