American Impressionist : : William H. Singer Jr. 1868-1943 (tentoonstelling Laren, Singer Laren, 16 september - 7 december 2008).

MLA

Schretlen, Helen. American Impressionist : William H. Singer Jr. 1868-1943 (tentoonstelling Laren, Singer Laren, 16 September - 7 December 2008). Laren: Singer, 2008.

APA

Schretlen, H. (2008). American Impressionist : William H. Singer Jr. 1868-1943 (tentoonstelling Laren, Singer Laren, 16 september - 7 december 2008). Laren: Singer.

Chicago

Schretlen, Helen American Impressionist: William H. Singer Jr. 1868-1943 (tentoonstelling Laren, Singer Laren, 16 September - 7 December 2008). Laren: Singer, 2008.