Hegner, R. W., & Andrews, J. (1930). Problems and methods of research in protozoology.. The Macmillan company.
Lua i Stíl Chicago (17ú heag.)Hegner, Robert William, agus Justin Andrews. Problems and Methods of Research in Protozoology.. New York: The Macmillan company, 1930.
Lua MLA (8ú heag.)Hegner, Robert William, agus Justin Andrews. Problems and Methods of Research in Protozoology.. The Macmillan company, 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.