Dingu, R. T. (1987). Comparison of some nursery management practices for the production of arabica coffee seedlings in Papua New Guinea. University of Papua New Guinea.
Lua i Stíl Chicago (17ú heag.)Dingu, Roy Takumale. Comparison of Some Nursery Management Practices for the Production of Arabica Coffee Seedlings in Papua New Guinea. Port Moresby: University of Papua New Guinea, 1987.
Lua MLA (9ú heag.)Dingu, Roy Takumale. Comparison of Some Nursery Management Practices for the Production of Arabica Coffee Seedlings in Papua New Guinea. University of Papua New Guinea, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
