Several sources, such as Rosidi (1968, p. 35) and Aveling (2009, p. 244), give the year as 1938. However, the next book in the Balai Pustaka series, Taman Penghiboer Hati: Beberapa Tjatatan Pergaoelan (BP 1427), was printed in 1941. Rosidi, Ajip (1968). Tjerita Pendek Indonesia [Indonesian Short Stories] (in Indonesian). Jakarta: Gunung Agung. OCLC348467.
Balai Pustaka 1941, pp. 3–4. Balai Pustaka (1941). "Pengantar" [Foreword]. Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, p. 14. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 15–16. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 16–18. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 18–20. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 20–22. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 20–25. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 26–29. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 30–34. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 34–37. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 37–41. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Soeman Hs 1941, pp. 41–47. Soeman Hs (1941). Kawan Bergeloet [Playmate] (in Indonesian). Batavia: Balai Pustaka. OCLC20651467.
Rosidi 1968, p. 35. Rosidi, Ajip (1968). Tjerita Pendek Indonesia [Indonesian Short Stories] (in Indonesian). Jakarta: Gunung Agung. OCLC348467.
Rosidi 1968, p. 36. Rosidi, Ajip (1968). Tjerita Pendek Indonesia [Indonesian Short Stories] (in Indonesian). Jakarta: Gunung Agung. OCLC348467.
Wolff 1978, p. xi. Wolff, John Ulrich (1978). Indonesian Readings. Ithaca: Cornell University Press. OCLC923614542.
Soeman Hs 1950, pp. 10–80. Soeman Hs (1950). Kawan Bergelut [Playmate] (in Indonesian). Jakarta: Balai Pustaka. OCLC28055623.
Wolff 1978, p. 161. Wolff, John Ulrich (1978). Indonesian Readings. Ithaca: Cornell University Press. OCLC923614542.
Rosidi 1968, p. 37. Rosidi, Ajip (1968). Tjerita Pendek Indonesia [Indonesian Short Stories] (in Indonesian). Jakarta: Gunung Agung. OCLC348467.