APA-viite (7. p.)

Champion, H. (2023). An investigation of certain factors concerning the resin-tapping industry in Pinus longifolia. Superintendent Government Printing.

Chicago-viite (17. p.)

Champion, H.G. An Investigation of Certain Factors Concerning the Resin-tapping Industry in Pinus Longifolia. Superintendent Government Printing, 2023.

MLA-viite (9. p.)

Champion, H.G. An Investigation of Certain Factors Concerning the Resin-tapping Industry in Pinus Longifolia. Superintendent Government Printing, 2023.

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