Cita APA (7th ed.)

Bergesen, H. O., & Parmann, G. (1993). Green globe yearbook. Oxford University Press.

Cita Chicago (17th ed.)

Bergesen, Helge Ole, i Georg Parmann. Green Globe Yearbook. Oxford: Oxford University Press, 1993.

Cita MLA (9th ed.)

Bergesen, Helge Ole, i Georg Parmann. Green Globe Yearbook. Oxford University Press, 1993.