Lua APA (7ú heag.)

GUPTA R K. (1996). RAPIDEX ENGLISH SPEAKING COURSE (HINDI). PUSTAK MAHAL.

Lua i Stíl Chicago (17ú heag.)

GUPTA R K. RAPIDEX ENGLISH SPEAKING COURSE (HINDI). DELHI: PUSTAK MAHAL, 1996.

Lua MLA (9ú heag.)

GUPTA R K. RAPIDEX ENGLISH SPEAKING COURSE (HINDI). PUSTAK MAHAL, 1996.

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