Gaya APA
Roberts, E H. (1972).
Viability of seeds .
London:
CHAPMAN & HALL.
Gaya Chicago
Roberts, E H.
Viability of seeds.
London:
CHAPMAN & HALL,
1972.
Text.
Gaya MLA
Roberts, E H.
Viability of seeds.
London:
CHAPMAN & HALL,
1972.
Text.
Gaya Turabian
Roberts, E H.
Viability of seeds.
London:
CHAPMAN & HALL,
1972.
Print.