APA ציטוט

Open Universityscience Foundation Course Team & Open University, S. F. (1971). Earth: Its shape, internal structure and composition,Unit22. Open University Press.

Chicago Edition Citation

Open Universityscience Foundation Course Team and Science Founda Open University. Earth: Its Shape, Internal Structure and Composition,Unit22. Open University Press, 1971.

ציטוט MLA

Open Universityscience Foundation Course Team and Science Founda Open University. Earth: Its Shape, Internal Structure and Composition,Unit22. Open University Press, 1971.