Philippine Virginia Tobacco Administration, University of the Philippines, Los Banos College of Agriculture, & UPCA-PVTA Research and Training Program. (1975). Three years of cooperative research on Philippine Virginia Tobacco: A terminal report. s.n.].
Παραπομπή σε μορφή Chicago (17η εκδ.)Philippine Virginia Tobacco Administration, Los Banos College of Agriculture University of the Philippines, και UPCA-PVTA Research and Training Program. Three Years of Cooperative Research on Philippine Virginia Tobacco: A Terminal Report. [S.l: s.n.], 1975.
Παραπομπή σε μορφή MLA (9th εκδ.)Philippine Virginia Tobacco Administration, et al. Three Years of Cooperative Research on Philippine Virginia Tobacco: A Terminal Report. s.n.], 1975.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.