(2021). World atlas (Sixth edition.). National Geographic.
Chicago Style (17th ed.) CitationWorld Atlas. Sixth edition. Washington, D.C.: National Geographic, 2021.
MLA引文World Atlas. Sixth edition. National Geographic, 2021.
警告:這些引文格式不一定是100%准確.
(2021). World atlas (Sixth edition.). National Geographic.
Chicago Style (17th ed.) CitationWorld Atlas. Sixth edition. Washington, D.C.: National Geographic, 2021.
MLA引文World Atlas. Sixth edition. National Geographic, 2021.