Wilkinson, Richard James (1901). "sĕkĕrup". A Malay-English dictionary. Hong Kong: Kelly & Walsh, limited. m/s. 392.
Lihat:
Swettenham, Frank Athelstane (1910). "screw". Vocabulary of the English and Malay languages. Shanghai & Hong Kong: Kelly & Walsh, limited. m/s. 116 – melalui Internet Archive.