Thangappan Pilla, P. V. Herculesinte veera krityagal. Balan Publications.
Chicago Edition CitationThangappan Pilla, P. V. Herculesinte Veera Krityagal. Balan Publications.
MLA Edition CitationThangappan Pilla, P. V. Herculesinte Veera Krityagal. Balan Publications.
Warning: These citations may not always be 100% accurate.