Παραπομπή APA

BURTON, M., & BuRTON, R. Wild life encyclopedia ( in 20 volumes). Marshall cavendish corporation.

Παραπομπή Chicago Style

BURTON, Maurice, και Robert BuRTON. Wild Life Encyclopedia ( in 20 Volumes). New York: Marshall cavendish corporation.

Παραπομπή MLA

BURTON, Maurice, και Robert BuRTON. Wild Life Encyclopedia ( in 20 Volumes). Marshall cavendish corporation.