APA
RALPH GRAY P. R. U. P. V., .YOUR WONDERFUL BODY. WASHINGTON, D.C., THE NATIONAL GEOGRAPHIC SOCIETY: .
Chicago
RALPH GRAY PAT ROBBINS URSULA PERRIN VOSSELER, .YOUR WONDERFUL BODY. WASHINGTON, D.C., THE NATIONAL GEOGRAPHIC SOCIETY: .
Harvard
RALPH GRAY P. R. U. P. V., .YOUR WONDERFUL BODY. WASHINGTON, D.C., THE NATIONAL GEOGRAPHIC SOCIETY: .
MLA
RALPH GRAY PAT ROBBINS URSULA PERRIN VOSSELER, .WASHINGTON, D.C., THE NATIONAL GEOGRAPHIC SOCIETY: . .
