APA-viite (7. p.)
NASA. NASA: Triumphs and Tragedies : 50 Years of Space Exploration : Skylab, The First 40 Days ; Four Rooms, Earth View ; Opening New Frontiers ; We Deliver ; Launch and Retrieval of Satellites.
Chicago-viite (17. p.)
NASA. NASA: Triumphs and Tragedies : 50 Years of Space Exploration : Skylab, The First 40 Days ; Four Rooms, Earth View ; Opening New Frontiers ; We Deliver ; Launch and Retrieval of Satellites.
MLA-viite (9. p.)
NASA. NASA: Triumphs and Tragedies : 50 Years of Space Exploration : Skylab, The First 40 Days ; Four Rooms, Earth View ; Opening New Frontiers ; We Deliver ; Launch and Retrieval of Satellites.
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