Gaya APA
Sargent, L, G, &, D. (1987).
Countdown to Mathematics Volume 1 (1).
England:
addison-wesley publishers limited.
Gaya MLA
Sargent, Lynne, Graham, &, David.
"Countdown to Mathematics Volume 1".
1
England:
addison-wesley publishers limited,
1987.
Buku Analog.