APA Style

Salmon, , W, I. (1939). Structures and abstraction a brief introduction to turbo pascal { 5.x,6.x,7.0 } . : Richard D. Irwin.

MLA Style

Salmon, , William, I.. "Structures and abstraction a brief introduction to turbo pascal { 5.x,6.x,7.0 }". : Richard D. Irwin, 1939. Text.