Do you mean this? Citrus amblycarpa (Nasnaran)

If so, it is in the holdings of the University of California Citrus Variety Collection

http://www.ccpp.ucr.edu/variety/index.html

also on the internet:

http://hortiplex.gardenweb.com/plants/nph-ind.cgi?name=Citrus&f=d&gl=1&p=1

http://hortiplex.gardenweb.com/plants/p1/gw1092398.html

http://www.fruits-journal.org/index.php?option=article&access=standard&Itemid=129&url=/articles/fruits/abs/2005/05/i5037/i5037.html

http://zipcodezoo.com/Plants/C/Citrus_amblycarpa/

I have 3 year old tree jeruk limau/limo/sambal/sate

Can we see a picture of it.

@Ambar Stary I am interested. I don know how to contact you. Can you please email me at anytayasmin@yahoo.com

@Anita Yasmin Restoring Eden has them https://restoringeden.co/product/mandarin-nasnaran/