Gaya APA
Systematic botany monographs. (1987).
USA:
The america society of agronomi.
Gaya Chicago
Systematic botany monographs.
.
USA:
The america society of agronomi,
1987.
Buku.
Gaya MLA
Systematic botany monographs.
.
USA:
The america society of agronomi,
1987.
Buku.
Gaya Turabian
Systematic botany monographs.
USA:
The america society of agronomi,
1987.
Buku.