Qiyi Mofangge Science & Technology Industrial Co. (2015). QY SpeedCube: QIDI S2. Cubo 2x2. Qiyi Mofangge Science & Technology Industrial Co.
Tohutoru Kātū Chicago (17th ed.)Qiyi Mofangge Science & Technology Industrial Co. QY SpeedCube: QIDI S2. Cubo 2x2. Korea: Qiyi Mofangge Science & Technology Industrial Co, 2015.
Tohutoro MLA (9th ed.)Qiyi Mofangge Science & Technology Industrial Co. QY SpeedCube: QIDI S2. Cubo 2x2. Qiyi Mofangge Science & Technology Industrial Co, 2015.
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