APA-referens (7:e uppl.)

WIGGER BERTHOLD U. (2002). PUBLIC PENSIONS AND ECONOMIC GROWTH. SPRINGER.

Chicago-referens (17:e uppl.)

WIGGER BERTHOLD U. PUBLIC PENSIONS AND ECONOMIC GROWTH. NEW YORK: SPRINGER, 2002.

MLA-referens (9:e uppl.)

WIGGER BERTHOLD U. PUBLIC PENSIONS AND ECONOMIC GROWTH. SPRINGER, 2002.