Generally known as the blue and brown books.

MLA

Wittgenstein, L. Generally Known As the Blue and Brown Books. Oxford: Basil Blackwell, .

APA

Wittgenstein, L. (.). Generally known as the blue and brown books. Oxford: Basil Blackwell.

Chicago

Wittgenstein, L. Generally Known As the Blue and Brown Books. Oxford: Basil Blackwell, ..