Nicolai, O., Peters, K., & Nedo, K. (2016). Heidi Specker. Camera Austria.
Lua i Stíl Chicago (17ú heag.)Nicolai, Olaf, Kathrin Peters, agus Kito Nedo. "Heidi Specker." Camera Austria 2016.
Lua MLA (8ú heag.)Nicolai, Olaf, et al. "Heidi Specker." Camera Austria, 2016.
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