APA-referens (7:e uppl.)

LAWRENS SANDERS. (1985). TANGENT FACTOR. BERKLEY BOOKS.

Chicago-referens (17:e uppl.)

LAWRENS SANDERS. TANGENT FACTOR. NEW YORK: BERKLEY BOOKS, 1985.

MLA-referens (9:e uppl.)

LAWRENS SANDERS. TANGENT FACTOR. BERKLEY BOOKS, 1985.