APA Style
Petras, James, National Library Borad, Singapore.. ().
Singapore National Bibliography.[computer file]. .
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Chicago Style
Petras, James, National Library Borad, Singapore..
Singapore National Bibliography.[computer file]..
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MLA Style
Petras, James, National Library Borad, Singapore..
Singapore National Bibliography.[computer file]..
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Turabian Style
Petras, James, National Library Borad, Singapore..
Singapore National Bibliography.[computer file]..
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