Darwin, C. R., & Gray, A. The variation of animals and plants under domestication / by Charles Darwin, M. A., F.R.S., &c. ; authorized edition, with a preface by professor Asa Gray... With illustrations.
Cita Chicago Style (17a ed.)Darwin, Charles Robert, y Asa Gray. The Variation of Animals and Plants Under Domestication / by Charles Darwin, M. A., F.R.S., &c. ; Authorized Edition, with a Preface by Professor Asa Gray... With Illustrations. New-York : Orange Judd & company, 245 Broadway, 18--.
Cita MLA (8a ed.)Darwin, Charles Robert, y Asa Gray. The Variation of Animals and Plants Under Domestication / by Charles Darwin, M. A., F.R.S., &c. ; Authorized Edition, with a Preface by Professor Asa Gray... With Illustrations.
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