diff --git a/citations.bib b/citations.bib
index 0ab3640..e373451 100644
--- a/citations.bib
+++ b/citations.bib
@@ -1,23 +1,29 @@
 
 @book{shackelford_introduction_2015,
-	address = {Boston},
-	edition = {Eighth edition},
-	title = {Introduction to materials science for engineers},
-	isbn = {9780133826654},
-	publisher = {Pearson},
-	author = {Shackelford, James F.},
-	year = {2015},
-	keywords = {Materials},
+  address   = {Boston},
+  edition   = {Eighth edition},
+  title     = {Introduction to materials science for engineers},
+  isbn      = {9780133826654},
+  publisher = {Pearson},
+  author    = {Shackelford, James F.},
+  year      = {2015},
+  keywords  = {Materials}
 }
 
 @book{curtis_orbital,
-	title = {Orbital mechanics for engineering students},
-	isbn = {9780128240250 9780323853453 9780081021330},
-	language = {English},
-	author = {Curtis, Howard D},
-	year = {2020},
-	note = {OCLC: 1235349370},
-	publisher = {Butterworth-Heinemann Publications},
-	edition = {Fourth edition}
-
+  title     = {Orbital mechanics for engineering students},
+  isbn      = {9780128240250 9780323853453 9780081021330},
+  language  = {English},
+  author    = {Curtis, Howard D},
+  year      = {2020},
+  note      = {OCLC: 1235349370},
+  publisher = {Butterworth-Heinemann Publications},
+  edition   = {Fourth edition}
+}
+
+
+@misc{thrustcurve,
+  title  = {Rocket {Motor} {Data}},
+  url    = {https://www.thrustcurve.org/},
+  author = {Coker, John}
 }