Walter, F. A. W., Pfeffer, S., Okoyomon, P., Thompson, K., Paca, B., Riechelmann, C., & Tawadros, G. (2020). Frank Walter - a retrospective: With texts by Precious Okoyomon, Barbara Paca, Susanne Pfeffer, Cord Riechelmann, Gilane Tawadros, Krista Thompson, and Frank Walter ; edited by Susanne Pfeffer. Koenig Books.
Chicago-referens (17:e uppl.)Walter, Francis Archibald Wentworth, Susanne Pfeffer, Precious Okoyomon, Krista Thompson, Barbara Paca, Cord Riechelmann, och Gilane Tawadros. Frank Walter - a Retrospective: With Texts by Precious Okoyomon, Barbara Paca, Susanne Pfeffer, Cord Riechelmann, Gilane Tawadros, Krista Thompson, and Frank Walter ; Edited by Susanne Pfeffer. London: Koenig Books, 2020.
MLA-referens (8:e uppl.)Walter, Francis Archibald Wentworth, et al. Frank Walter - a Retrospective: With Texts by Precious Okoyomon, Barbara Paca, Susanne Pfeffer, Cord Riechelmann, Gilane Tawadros, Krista Thompson, and Frank Walter ; Edited by Susanne Pfeffer. Koenig Books, 2020.