APA
KATHLEEN COSTELLO BEER, .WHAT HAPPENS IN THE SPRING. THE NATIONAL GEOGRAPHIC SOCIETY, 1977: .
Chicago
KATHLEEN COSTELLO BEER, .WHAT HAPPENS IN THE SPRING. THE NATIONAL GEOGRAPHIC SOCIETY, 1977: .
Harvard
KATHLEEN COSTELLO BEER, .WHAT HAPPENS IN THE SPRING. THE NATIONAL GEOGRAPHIC SOCIETY, 1977: .
MLA
KATHLEEN COSTELLO BEER, .THE NATIONAL GEOGRAPHIC SOCIETY, 1977: . .
