National Azolla Action Program. (1989). Azolla: Its culture, management and utilization in the Philippines. National Azolla Action Program.
Chicago-viite (17. p.)National Azolla Action Program. Azolla: Its Culture, Management and Utilization in the Philippines. [Los Baños, Laguna]: National Azolla Action Program, 1989.
MLA-viite (9. p.)National Azolla Action Program. Azolla: Its Culture, Management and Utilization in the Philippines. National Azolla Action Program, 1989.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.