Gaya APA
BEAKLEY, G, C.
(1969).
The Slide Rule and Its Use in Problem Solving
(
2)
.
London:
The MacMillan Company.
Gaya MLA
BEAKLEY, George, C.
"The Slide Rule and Its Use in Problem Solving".
2
London:
The MacMillan Company,
1969.
Buku.