WALKER, R. (2005). Under the microscope the human body volume 4 making life: How we reproduce and grow. Grolier Educational.
Lua i Stíl Chicago (17ú heag.)WALKER, Richard. Under the Microscope the Human Body Volume 4 Making Life: How We Reproduce and Grow. Danbury: Grolier Educational, 2005.
Lua MLA (9ú heag.)WALKER, Richard. Under the Microscope the Human Body Volume 4 Making Life: How We Reproduce and Grow. Grolier Educational, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.