APA Format
Gibbs, R. Darnley. (1950).
Botany : an evolutionary approach / by R. Darnley Gibbs
. Philadelphia, Toronto :: The Blakiston Company,.
MLA Format
Gibbs, R. Darnley.
Botany : an evolutionary approach / by R. Darnley Gibbs
. Philadelphia, Toronto :: The Blakiston Company,, 1950
Chicago Format
Gibbs, R. Darnley. Botany : an evolutionary approach / by R. Darnley Gibbs. Philadelphia, Toronto :: The Blakiston Company,, 1950.