APA-referens (7:e uppl.)

KERROD, R. Encyclopedi of science 10: Transportation from the bicycle to spacecraft. Macmillan Publishinng Company.

Chicago-referens (17:e uppl.)

KERROD, Robin. Encyclopedi of Science 10: Transportation from the Bicycle to Spacecraft. Macmillan Publishinng Company.

MLA-referens (8:e uppl.)

KERROD, Robin. Encyclopedi of Science 10: Transportation from the Bicycle to Spacecraft. Macmillan Publishinng Company.

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