Joerdens-Roettger, D. (1987). Seed potato production in the Philippines: In vitro culture and rapid mutiplication techniques. Dt. Ges. fur Techn. Zusammerarbeit.
Lua i Stíl Chicago (17ú heag.)Joerdens-Roettger, Dagmar. Seed Potato Production in the Philippines: In Vitro Culture and Rapid Mutiplication Techniques. Eschborn, Federal Republic of Germany: Dt. Ges. fur Techn. Zusammerarbeit, 1987.
Lua MLA (9ú heag.)Joerdens-Roettger, Dagmar. Seed Potato Production in the Philippines: In Vitro Culture and Rapid Mutiplication Techniques. Dt. Ges. fur Techn. Zusammerarbeit, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.