Gaya APA
Valles, C, G, S, (, , , , ).
(1986).
The art of choosing.
.
Anand:
Gujarat Sahitya Prakash.
Gaya MLA
Valles, Carlos, G.,, S.J., (1925-, , , , ).
"The art of choosing. ".
Anand:
Gujarat Sahitya Prakash,
1986.
Buku.