McGraw-Hill Companies. McGraw-Hill School Division. National Geographic Society (U.S.). Educational Services & Moyer, R. On the move (Macmillan/McGraw-Hill edition.).
Chicago-viite (17. p.)McGraw-Hill Companies. McGraw-Hill School Division. National Geographic Society (U.S.). Educational Services ja Richard Moyer. On the Move. Macmillan/McGraw-Hill edition.
MLA-viite (8. p.)McGraw-Hill Companies. McGraw-Hill School Division. National Geographic Society (U.S.). Educational Services ja Richard Moyer. On the Move. Macmillan/McGraw-Hill edition.
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