Castro, I. R. (1978). The effect of photoperiod on the flowering of Polytrias amaura (Buse) O. Ktze [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-Zitierstil (17. Ausg.)Castro, Irma Remo. The Effect of Photoperiod on the Flowering of Polytrias Amaura (Buse) O. Ktze [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1978.
MLA-Zitierstil (9. Ausg.)Castro, Irma Remo. The Effect of Photoperiod on the Flowering of Polytrias Amaura (Buse) O. Ktze [microform]. Photoduplication Service. University of the Philippines Library, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.