SM U-20 (Germany)
[ar] غواصة يو-20 (ألمانيا)
[da] U 20
[de] U 20 (U-Boot, 1913)
[es] Submarino SM U-20 (1912)
[fa] اس‌ام او-۲۰
[fi] SM U-20
[fr] Unterseeboot 20 (1912)
[he] SM U-20 (גרמניה)
[it] SM U-20 (Germania)
[nl] U 20 (Kaiserliche Deutsche Marine)