古多尔 & Lawick-Goodall. (1980). 黑猩猩在召唤: In the shadow of man. 科学出版社.
Lua i Stíl Chicago (17ú heag.)古多尔 agus Lawick-Goodall. 黑猩猩在召唤: In the Shadow of Man. 科学出版社, 1980.
Lua MLA (8ú heag.)古多尔 agus Lawick-Goodall. 黑猩猩在召唤: In the Shadow of Man. 科学出版社, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.