APA-čujuhus (7. p.)
Sutherland, W. J. (2020). What works in conservation 2020. Open Book Publishers.
Chicago-čujuhus (17. p.)
Sutherland, William J. What Works in Conservation 2020. Cambridge, England: Open Book Publishers, 2020.
MLA-čujuhus (9. p.)
Sutherland, William J. What Works in Conservation 2020. Open Book Publishers, 2020.
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