Perry, H. (2021). National Geographic complete photo guide: How to take better pictures. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerry, Heather. National Geographic Complete Photo Guide: How to Take Better Pictures. Washington, D.C.: National Geographic, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPerry, Heather. National Geographic Complete Photo Guide: How to Take Better Pictures. National Geographic, 2021.
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