APA

Delprete P. G., .Notes on some South American species of Psychotria subgenus heteropsychotria (<Rubiceae>), wilh observations on rubiaceus taxonomic characters. : .

Chicago

Delprete Piero G, .Notes on some South American species of Psychotria subgenus heteropsychotria (<Rubiceae>), wilh observations on rubiaceus taxonomic characters. : .

Harvard

Delprete P. G., .Notes on some South American species of Psychotria subgenus heteropsychotria (<Rubiceae>), wilh observations on rubiaceus taxonomic characters. : .

MLA

Delprete Piero G, .: . .