Gupta S C. & Kumkum Gupta. English prepositions: What?where?how? Arihant Publications.
Chicago Edition CitationGupta S C. and Kumkum Gupta. English Prepositions: What?where?how? Meeru: Arihant Publications.
MLA Edition CitationGupta S C. and Kumkum Gupta. English Prepositions: What?where?how? Arihant Publications.
Warning: These citations may not always be 100% accurate.